Thread receiver and remover



Feb. 16, 1943. R. SINCLAIR THREAD RECEIVER AND REMQYER Filed Aug. 9,1941' INVENTOR. ROY SlNCLAIR.

Paul A.TIUIOT.'

ATTORNEY.

Patented Feb. 16, 1943 UNKTED STATES it PATENT Qi FICE 2 Claims.

My invention relates to an improvement in a device to remove thecuttings or thread from a record disc used in the recording of sound andparticularly to an improvement in the art as disclosed in my Patent No.2,237,638, filed June 19,

1940, and issued April 8, 1941, for Thread removal attachment forrecording mechanisms. Among the .purposes and objects of my inventionare to provide:

A resilient support for the collector.

A simple means of adjusting the speed of the collector.

A simple device that may be used by home and amateurs suited to removethe shavings or thread from any disc being processed for soundreproduction.

A receiver for shavings and/or threads from the transmitting styluswhich may automatically adjust itself to untrue or wabbly turntables andrecord discs.

A shaving receiver and remover that can be set near the revolvingturntable and record disc being cut.

A resilient mounting and portable stand for collectors of shavings orthread while record making and which is positioned outside the peripheryof the revolving record disc.

I accomplish these and other objects by the construction hereindescribed and shown in the accompanying drawing forming a part hereof,in which:

Fig. 1 is a partial section and elevation.

Fig. 2 is a fragmentary detail of a modified collector.

Fig. 3 is an elevation of a modification of the resilient stand.

Fig. 4 is a plan view showing the application of my device and thehorizontal travel of the collector in broken lines.

Fig. 5 is an elevation showing the extremes of position of collector.

Fig. 6 is an elevation showing the vertical travel of the collector inbroken hnes.

Similar reference characters refer to similar parts throughout theseveral views of the drawing and in the specification to follow.

In making records for reproducing sound on a disc, such as the recordsmade of radio entertainment and of voice reproduction at home, both foramateur and professional use, the stylus used in cutting grooves in thedisc produces a shaving or thread which is relatively tough and ofconsiderable length, depending on the length of the recording and sizeof the record being made. This shaving or thread, unless removed fromthe sur-.

face of the disc obstructs the movement of the stylus, and thus thesound groove may be intercepted and fidelity of the recording destroyed.

My thread collector is particularly suited to the numerous types of homerecording instruments and may be placed on the stationary parts near therevolving turntable or may be attached if desired by providing anaperture to receive the stanchion. The turntables are usually operatedat '78 revolutions or 33 revolutions. Each speed, as well as the size ofthe record, requires an adjustment of the speed of the collector.

My collector and its mounting may be an attached unit or an accessorywhich may be placed on the recording instruments when the record is tobe made.

Numerous devices for removing the thread include vacuum cleaners, handoperated and stationary brushes and deflecting fingers which cause thethread to accumulate out of the path or" the stylus and the sound groovein the record cut by it. Each of these methods and devices havedisadvantages, such as wadding and clogging of the thread in theremoving device, or the thread becomes entangled on the parts locatednear the revolving table and record disc carried on it.

In my Patent #2231638, I have shown the use of a cylinder, cone, orother collector which rolls on and by contact with the disc. Thecollector is provided with a fuzzy surface such as a coating of flock,felt, or the like, which picks up the thread from the revolving recordas it is being made and While in motion. In general, the collectorprovided in this improvement is somewhat similar except that the meansof supporting the collector and adjusting it is quite diiierent.

My instant improvement is provided with a support entirely outside theperiphery of the disc and the resilient mounting provides forconsiderable vertical movement and permits the collector to conform tothe untrueness or wabble of the disc while in motion, as well as toprovide a vertical adjustment and also an adjustment of the relativerotative speed of the collector in its relation to the speed of theturntable. The free end of the revolving collector may be so adjusted asto contact the disc near its center, for slow speed, or the end of thecollector toward the support may be adjusted to contact the disc nearits periphery for fast speed, or the collector may be made slightlybarrel shaped so that points at varying distances between the ends ofthe collector may be adjusted to contact the record, thereby affordingan indefinite number of speed changes, yet collecting the thread at anypart between the ends.

The surface of the collector automatically picks up the thread in theflock of the covering, whether it be one single thread end or a numberof ends caused by breaking.

The vertical adjustment of the collector and its movements permitted byits novel resilient mounting may be better understood by a study of theconstruction, reference being made to the drawing.

I have not attempted to disclose all possible modifications which may besuited to carry out the principles underlying my invention, but ratherto illustrate by means of preferred. detailed construction embodyingthese principles. I have described my device in detail, not to limit thescope of my invention, but to clearly disclose one of the constructionswhich give satisfactory results and to specify the parts more broadlyset forth in the appended claims which set forth.

my invention.

I have provided a stanchion secured to the recording machine 2 or base 3and holding a spring or other resilient member 4 to which is secured thearbor 5 on which the collector 5 is free to revolve.

The arbor and the collector may be raised or lowered and also swung fromthe contact position over the record disc l' to any position beyond theperiphery 8 of the disc when not in position;

to collect the shaving or thread 9 made by the stylus H3 in forming thesound groove in the surface of the record 1.

Referring particularly to Figs. 1 and 5, I have shown the member 4 inthe form of a coil spring, the bottom end of which rests against thebase 3 and the top end against the washer I i clamped clamps theexterior of the coils. The arbor may' thus. be moved a distance equal tothe pitchof the coils of the spring when the screw i5 is loosened or, byturning the spring within: the arbor collar any part of the distance ofthe pitch may be moved, thereby providing a minuteand accurate verticaladjustment for the arbor collar and the collector and arbor supported byit.

In Fig. 3, I have shown a U spring 28 which serves as the resilientmember. This spring is provided with apertures 2i near its ends 22,suitable to engage the stanchion I which is provided with the nut 23under the spring, in addition to the nut l2 above the spring.

The arbor is secured to the center of the spring 2!) by the nut 24 orotherwise. By adjusting the nuts i2 and 23 up or down on the stanchion,the arbor may be raised or lowered to adjust the collector.

The arbor may be inclined downward at its free end 25 to cause the endof the collector to contact the surface of the record disc and bylowering the opposite end of the arbor by moving its adjustment on thestanchion. The opposite end 28 of the collector may be made to contactthe surface of the record disc.

When the end 25 contacts the disc, the collector is revolved relativelyslower than when the end 26 is brought into contact due to the increaseof speed of the longer annular track on which the end of collector, nearthe periphery of the disc travels.

In Fig. 2 of the drawing, I have shown a fragment of the surface of abarrel shaped collector 2'! which may be so adjusted on the surface ofthe record as to travel at any desired speed between the extreme speedsof either ends. This is made possible by adjusting the arbor to anydegree of. inclination from parallel to the surface of. the record discto an incline in which the free end may be upward or downward.

The amount of inclination of the axis A of the arbor 5 may be seen byreferring to Fig. 1 of the drawing in which the broken line A--Aindicates the axis in a horizontal position parallel to the face oftherecord disc I. The broken line DD represents the axis inclineddownward. The broken line U--U represents the axis inclined upward. Theamount of inclination is exaggerated so that it may be readily seen andin either The surface barrel shaped collector 21 likewiseis curvedaxially only enough so that it readily picks up the thread in its flockcovering 29.

The flock may be secured by adhesive to the collector or may beprovidedon. a piece of fabric" or other material secured to thesurfaceof the: In such case, the flock may be in the.

collector. form of a pile such as velvet, for instance.

In Fig. 6, I have shown a modification having rubber or similarresilient supporting member:

30 for the arbor 5 which may be adjusted vertically by-the top nut 12and the nut 23 under said member. The adjusting nuts 12 and 23 engagethe threaded stanchion I and. in other respects serve the same purposeas the springs shown in the other figures of the drawing and herein 1above described.

The stanchion, being positioned outside the periphery of the disc,permits the arbor and collector to be swung on the axis of the stanchionand clear of the chsc for removing shavings and :1 when the record isused for reproducing. When the disc is being cut or the sound groove isbeing formed, the collector iseasily swung onsaid stanchion so that theaxis of the arborand' collector is about radially disposed to -the axisaboutwhich the disc revolves. Frictional resistance to the swinging ofthe collector on the stanchion by the adjusting nuts and resiliency ofthe member 4.

The springs or resilient member provide not only a means of changing therelative speed between the collector and disc but also affords a meansof restricting the free movement of the 'arbor and. collector inswinging on the stanchion. The adjusting nuts likewise may be soadjusted that the arbor is not only raised or lowered on.

the stanchion, but the amount of resilience may be increased byincreasing the compression of the resilient member providing. a greateror lesser: contact pressure between the collector and. disc.

in: addition to the angular disposition. of. the collector and the arboron which it revolves in relation to the face of the record disc.

The adjustments afforded, as well as the resiliency of the mountingpermit the desired freedom of movement of the collector in relation tothe disc which may wabble and run out of true.

To those skilled in the art to which my invention pertains, numerousother modifications of the details herein disclosed may be made, and Ido not wish to be limited to these details, as I may wish to departtherefrom within the scope of the appended claims which set forth myinvention.

I claim:

1. In a shaving remover for disc records, a supporting stanchion, anarbor resiliently secured to said stanchion at one end and a collectorfreely rotatable on said arbor and means adjusting the relative speed ofsaid collector in relation to the speed of said disc comprising verticaladjusting means between said stanchion and said arbor causing either endof said collector to contact said disc.

2. In a shaving remover for disc records, a supporting stanchion, anarbor resiliently secured to said stanchion at one end and a collectorfreely rotatable on said arbor and means adjusting the angulardisposition of the axis of said collector to the face of said disc toadjust the relative speed of said collector by causing either of theends of said collector to contact and to be revolved by said disc.

ROY SINCLAIR.

